12142111211 has 4 divisors (see below), whose sum is σ = 12172696272. Its totient is φ = 12111526152.

The previous prime is 12142111207. The next prime is 12142111231. The reversal of 12142111211 is 11211124121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11211124121 = 36131 ⋅310291.

It is a cyclic number.

It is not a de Polignac number, because 12142111211 - 2² = 12142111207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12142111211.

It is not an unprimeable number, because it can be changed into a prime (12142111231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15291935 + ... + 15292728.

It is an arithmetic number, because the mean of its divisors is an integer number (3043174068).

Almost surely, 2^12142111211 is an apocalyptic number.

12142111211 is a deficient number, since it is larger than the sum of its proper divisors (30585061).

12142111211 is an equidigital number, since it uses as much as digits as its factorization.

12142111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30585060.

The product of its digits is 32, while the sum is 17.

Adding to 12142111211 its reverse (11211124121), we get a palindrome (23353235332).

The spelling of 12142111211 in words is "twelve billion, one hundred forty-two million, one hundred eleven thousand, two hundred eleven".